Irrigation pipe connector

ABSTRACT

An irrigation pipe connector has a core that is adapted to connect to an irrigation element and a wing that is attachable to a wall of a pipe. The wing is provided with resiliency to allow the connector to deform in response to changing fluid pressures in the pipe. In addition, the wing may be provided with a thin segment in order to reduce potential damage during welding of the wing to the wall of the pipe.

The present application claims priority to U.S. Provisional ApplicationNo. 61/031,293, filed Feb. 25, 2008, whose contents are incorporated intheir entirety.

BACKGROUND

The present disclosure relates to a connector for use in an irrigationsystem.

Such a connector may be used in a main distribution pipe to enable forexample drip irrigation pipes to branch off therefrom.

US Patent Application No. 20050194469, the disclosure of which isincorporated herein by reference, describes an irrigation pipe with pipeconnectors.

US Patent Application No. 20070074776, the disclosure of which isincorporated herein by reference, describes that the walls of a pipeunder internal hydrostatic pressure experience stress.

SUMMARY

The following embodiment and aspects thereof are described andillustrated in conjunction with systems, tools and methods which aremeant to be exemplary and illustrative, not limiting in scope.

In one aspect, the present invention is directed to a irrigation pipeconnector. In one embodiment, the irrigation pipe connector includes:(a) a core having an upper portion, a lower portion and an openingextending between the upper and lower portions, the core being adaptedto connect to an irrigation element, and (b) a wing connected to thecore and extending radially outwardly therefrom, the wing comprising aleg and a flange, the flange being adapted to attach to a wall of anirrigation pipe, the leg being attached at a first end thereof to theflange and at a second end thereof to the core; wherein at least aportion of the connector is adapted to resiliently bend to thereby allowdisplacement of the flange relative to the core.

The core and the wing may be integrally formed of the same material andhave unitary one-piece construction.

The opening may comprise a bore and the connector is adapted to connectto the irrigation element at the bore. Furthermore, the bore may bethreaded.

A groove may be formed in the connector between the core and the leg.Furthermore, a depth of the groove may be at least as great as athickness of the leg. In addition, the leg may extends upwardly andradially outwardly, from the core's lower portion towards the flange.

The core has an axis (C), and the flange may comprise a radially inwardsegment and a peripheral segment that extends radially outwardly fromthe radially inward segment; wherein a thickness of the peripheralsegment is smaller than a thickness of the radially inward segment, thethicknesses of the segments being taken in a direction along the axis(C).

In another embodiment, the irrigation pipe connector includes: (a) acore having an axis (C) and being adapted to connect to an irrigationelement; and (b) a wing connected to the core and extending radiallyoutwardly therefrom relative to the axis (C), the wing comprising aradially inward segment and a peripheral segment that extends radiallyoutwardly from the radially inward segment; wherein a thickness of theperipheral segment is smaller than a thickness of the radially inwardsegment, the thicknesses of the segments being taken in a directionalong the axis (C).

In still another embodiment, the irrigation pipe connector includes: (a)a core adapted to connect to an irrigation element; and (b) a wingcomprising a leg and a flange, the wing extending about the core andconnected to the core via the leg, the wing being attachable to a pipe;wherein the flange comprises a main segment and a peripheral segment andthe peripheral segment has a thickness that is smaller than a thicknessof the main segment.

In another aspect, the present invention is directed to an irrigationpipe having a lumen including a pipe wall; and at least one irrigationpipe connector. The irrigation pipe connector includes: (a) a coreadapted to connect to an irrigation element; and (b) a wing extendingabout the core and comprising a segment connected to the pipe wall;wherein at least a portion of the wing is adapted to resiliently bend tothereby allow displacement of the segment connected to the pipe wallrelative to the core.

In addition to the exemplary aspects and embodiment described above,further aspects and embodiments will become apparent by reference to thefigures and by study of the following detailed descriptions.

BRIEF DESCRIPTION OF THE FIGURES

Exemplary embodiments are illustrated in referenced figures. It isintended that the embodiments and figures disclosed herein are to beconsidered illustrative, rather than restrictive. The disclosure,however, both as to organization and method of operation, together withobjects, features, and advantages thereof, may best be understood byreference to the following detailed description when read with theaccompanying figures, in which:

FIG. 1 shows a perspective view of a pipe incorporating connectors inaccordance with the present disclosure;

FIG. 2 shows a partial cross sectional view of the pipe taken throughone of the connectors in the plane II-II in FIG. 1;

FIG. 3 shows a perspective top view of the connector;

FIG. 4 shows a section of FIG. 2; and

FIGS. 5A and 5B show the arrangement of FIG. 2 with the connectorcoupled to an irrigation element and subjected to various resilientbending.

It will be appreciated that for simplicity and clarity of illustration,elements shown in the figures have not necessarily been drawn to scale.For example, the dimensions of some of the elements may be exaggeratedrelative to other elements for clarity. Further, where consideredappropriate, reference numerals may be repeated within the figures toindicate like elements.

DETAILED DESCRIPTION

Attention is first drawn to FIG. 1. A pipe 10 having a longitudinal axisX has an axially extending lumen 12 that is surrounded by a wall 14. Twoconnectors 16, each having its own axis C, are attached atlongitudinally spaced apart locations to the wall 14 of the pipe 10adjacent apertures 11 that are formed through the wall 14. The pipe 10is of a lay-flat type which when not in use under internal fluidpressure and/or when rolled on a reel may have a shape of a generallyflat strip (not shown). When the pipe 10 is under no internal fluidpressure, the connector axis C may be coincident with a normal N to thepipe 10.

An outward and an inward direction of the axis C is defined respectivelyout of and into the pipe 10. It should be noted that the directionalterms appearing throughout the specification and claims are forillustrative purposes only, and are not intended to limit the scope ofthe appended claims. The terms “up”, “above”, “upper”, “out” (andderivatives thereof) define similar directions; and the terms “down”,“below”, “lower”, “in” (and derivatives thereof) define similardirections.

Attention is drawn to FIGS. 2 and 3. The connector 16 has a central core18 that extends a thickness or height H along axis C and a peripheralwing 20 that is located thereabout. In one embodiment, the central core18 and the peripheral wing 20 are integrally formed of the same materialand have unitary one-piece construction.

The central core 18 has an upper portion 18 a which is exposed to theouter surface of the pipe 10 and an lower portion 18 b which is exposedto the inner surface of the pipe 10. In one embodiment, the wing 20extends radially outwardly relative to the core 18. The core 18 isadapted to retain an irrigation element 40 (See FIGS. 5A, 5B) and isprovided with an opening 22 that is formed therein along axis C andextends between the upper portion 18 a and the lower portion 18 b. Inone embodiment, the opening 22 is in the form of a through going bore22. The bore 22 is optionally adapted to connect to the irrigationelement which may be for example a drip irrigation pipe, an irrigationfitting, a sprinkler, a valve, a pressure regulator, etc. Optionally,the bore 22 is threaded though other means may be formed in the bore 22in order to retain an irrigation element. Preferably the core 18 isadapted to releasably retain irrigation elements.

The wing 20 has a leg 24 and a flange 26 which are joined at a rim 28.As seen in FIG. 2, the leg 24 is attached at its first end 24 a towardsthe flange 26 and at its second end 24 b to the core 26. At its secondend 24 b, the leg 24 extends outwardly from an inner circumference ofthe core 18, proximate the core's lower portion 18 b, to the rim 28.Thus, in one embodiment, the leg 24 extends from the core's lowerportion 18 b, upwardly along axis C and radially outwardly away fromaxis C, to the flange 26. As also seen in FIG. 2, the thickness of theleg 24 is given by T1.

The flange 26 has a radially inward main segment 30 and a radiallyoutward peripheral segment 32. The main segment 30 extends in a radiallyoutward direction relative to the core 18, generally perpendicular toaxis C and in a direction away from axis C from the rim 28 to theperipheral segment 32. The peripheral segment 32 extends from the mainsegment 30 in a radially outward direction relative to the core 18. Theconnector 16 is attached at the flange 26 optionally to an inner surface34 of the wall 14 adjacent aperture 11 and optionally the attachment isperformed by, for example, bonding or welding, etc.

A peripheral groove 36 is formed in the connector 16 between the leg 24and the core 18. As seen in FIG. 2, the depth of the groove 36, whichdepth is taken from the uppermost level of the main segment 30 and theperipheral segment 32, is given by T2. In one embodiment, the groovedepth T2 is at least 1.0 times T1, and more preferably 2.0 times T1.This optionally provides a first resilient region R1 in the connector 16about the axis C, between the leg 24 and the core 18 at the core's lowerportion 18 b. Optionally, a second resilient region R2 may be formed inthe connector 16 adjacent the rim 28 where the flange 26 and leg 24merge. It is noted that the term resilience implies that the resultingstructure is afforded locations with resilient bending. The degree ofresilient bending is a question of optimal design and it may be thatembodiments of the connector 16 may have only one location or more thantwo locations that are afforded resilient bending.

In cross sections including axis C, the aperture 11 in the pipe's wall14 has a dimension D1 that is the diameter of the aperture 11 when thepipe 10 is in a lay-flat state wherein the aperture 11 may have acircular form. It is noted that when subjected to internal fluidpressure, the aperture 11 may assume an elliptical shape when viewedalong the axis C (view not shown) with the larger dimension of theellipse being oriented along the pipe's circumferential direction. Thisis due to the fact that pipes under internal hydrostatic pressuretypically experience larger stress in the circumferential direction asopposed to the longitudinal direction.

Attention is drawn to FIGS. 5A and 5B showing a partial view of anirrigation element in the form of a fitting 40 that is retained in theconnector's opening 22. As seen in the cross-section of FIG. 5A, underinternal fluid pressure illustrated by short arrows 38, the pipe 10expands outwardly and thereby the aperture 11 reaches an enlarged state.At least a portion of the wing 20 is adapted to resiliently bend tothereby allow displacement relative to the core 18 of the wing's flange26 that is attached to the pipe's wall 14. In a cross section includingaxis C, the aperture 11 in the pipe's wall 14 has in the enlarged statea dimension D2 that is larger than a respective dimension D1 of theaperture 11 in the lay-flat state. In one embodiment, in the pipe'scircumferential direction D2 may be 25% larger than D1 and in the pipe'slongitudinal direction D2 may be 15% larger than D1 and therefore inthis embodiment the resiliency of the connector is adapted to allow suchvarying displacements of the flange 26 in relation to the core 18.

As seen in the cross-section of 5B, the irrigation element attached tothe connector may be subjected in some cases to a force F acting in adirection transverse to axis C. Force F may be due to a lateral pipe(not shown) attached to the irrigation element that exhibits deformationdue to high and low temperatures imposed thereupon during day and night.The core 18 and the wing 20 are arranged such that at least a portion ofthe wing 20 is adapted to resiliently bend to thereby allow displacementof the wing's flange 26 relative to the core 18. When the connector 16is installed in a pipe 10, the connector's core 18 may bend relative tothe pipe 10 such that the connector axis C may be tilted by an angle αrelative to a normal N to the pipe 10. In one embodiment, α may reach anangle of 10° when, for example, the connector is subjected to a force Fof a magnitude of about 850 N.

Under internal fluid pressure, the pipe 10 may experience stresses whichmay cause deformations in the wall 14 of the pipe 10 that may betransformed to the connector 16 that is attached thereto. Thesedeformations may ruin or harm, inter alia, the retention of theirrigation element in the core 18. In the connector 16 in accordancewith the present disclosure, such deformations resiliently deform thewing 20 and thereby displace the flange 26 in relation to the core 18.As a result, the extent of damage that may have been imposed upon theconnector 16 is eliminated or decreased.

By way of an example, the material of the pipe 10 may be polyethylene,the diameter of the pipe 10 may be about 100 millimeters, the pipe 10may withstand fluid pressure of up to 3 bars and the wing 20 may startto resiliently deform at an internal fluid pressure in the pipe 10 ofabout 0.3 bars.

Attention is now drawn to FIGS. 2 and 4. In an embodiment, the connector16 is attached to the wall 14 of the pipe 10 by welding it to the wall14 of the pipe 10 by at least portions of the connector 16 and/or wall14 that at an instant immediately prior to attachment were in a meltedform. Preferably, the connector 16 is attached to the wall 14 of thepipe 10 by ultrasonic welding and/or knurling and preferably theconnector is made of a material that is similar to material that isincluded in the wall of the pipe. The pipe may be produced as a high ora low pressure resistant hose made of polymer materials strengthened bya bonded layer or layers such as textile, knitted woven or non-wovenfabric, bi-oriented polymer, high stiffness polymer, etc. Polymermaterials such as PE, PP, PVC, TPE, elastomers and others may be used.

In a part that is adapted to be attached to a surface by such welding,the width of the part determines, inter alia, the amount of energy thatis required for attachment. In a lay flat irrigation pipe 10, portionsof the wall 14 of the pipe 10 that are not attached to, or concealed by,the connector 16 may be damaged or harmed by this energy that isrequired for attachment. For example, a portion of the wall 14 adjacentthe peripheral segment 32 of the flange 26 may be damaged when theflange 26 is attached to the wall 14. The wall 14 of the lay flatirrigation pipe may be coated for example by a water impervious layerand during attachment damage may be caused to the layer by for examplepin holes that are formed in the layer through which fluid may seep.

As seen in FIGS. 2 and 4, the main segment 30 of the flange 26 has afirst thickness W1 and the peripheral segment 32 of the flange 26 has asecond thickness W2, the thicknesses W1 and W2 being taken in adirection along the axis C. The second thickness W2 is smaller than thefirst thickness W1 and both thicknesses W2, W1 are substantially smallerthan the thickness H of the core 18 and/or a height of the core 18 thatprojects into the pipe 10.

As a result of W2 being smaller than W1, the energy that is required forthe attachment of the peripheral segment 32 of the flange 26 to the wall14 of the pipe 10 is reduced in relation to the energy that is requiredfor the attachment of the main segment 30 to the wall 14. Therefore, thewall 14 adjacent the peripheral segment 32 is less likely to be damagedor may be damaged to a smaller extent during attachment.

By way of an example, the first thickness W1 is equal to about 2millimeters and the second thickness W2 is equal to about 0.6millimeters.

The thinner thickness W2 of the peripheral segment 32 provides also theadvantage that the connector 16 is provided with a flexible periphery atthe flange 26. This enables the pipe 10, for example when under internalfluid pressure, to better assume a rounded form adjacent the connector16. It is noted that this advantage is present when the connector 16 isattached to the wall of the pipe also by methods such as by bonding,welding, etc.

In the description and claims of the present application, each of theverbs, “comprise” “include” and “have”, and conjugates thereof, are usedto indicate that the object or objects of the verb are not necessarily acomplete listing of members, components, elements or parts of thesubject or subjects of the verb.

Although the present embodiment has been described to a certain degreeof particularity, it should be understood that various alterations andmodifications could be made without departing from the scope of thedisclosure as hereinafter claimed.

1. An irrigation pipe connector comprising: a core having an upperportion, a lower portion and an opening extending between the upper andlower portions, the core being adapted to connect to an irrigationelement; and a wing connected to the core and extending radiallyoutwardly therefrom, the wing comprising a leg and a flange, the flangebeing adapted to attach to a wall of an irrigation pipe, the leg beingattached at a first end thereof to the flange and at a second endthereof to the core; wherein: at least a portion of the connector isadapted to resiliently bend to thereby allow displacement of the flangerelative to the core; the core has an axis (C); the flange comprises aradially inward segment and a peripheral segment that extends radiallyoutwardly from the radially inward segment; and a thickness of theperipheral segment is smaller than a thickness of the radially inwardsegment, the thicknesses of the segments being taken in a directionalong the axis (C).
 2. The irrigation pipe connector according to claim1, wherein the core and the wing are integrally formed of the samematerial and have unitary one-piece construction.
 3. The irrigation pipeconnector according to claim 1, wherein the opening comprises a threadedbore and the connector is adapted to connect to the irrigation elementat the threaded bore.
 4. The irrigation pipe connector according toclaim 1, wherein a groove is formed in the connector between the coreand the leg.
 5. The irrigation pipe connector according to claim 4,wherein a depth of the groove is at least as great as a thickness of theleg.
 6. The irrigation pipe connector according to claim 4, wherein theleg extends upwardly and radially outwardly, from the core's lowerportion towards the flange.
 7. The irrigation pipe connector accordingto claim 4, wherein the groove is open toward the upper portion, theirrigation pipe connector adapted to removably receive the irrigationelement adjacent to the upper portion.
 8. The irrigation pipe connectoraccording to claim 1, wherein: the leg connects to the core at a firstresilient region; and the leg connects to the flange at a secondresilient region.
 9. The irrigation pipe connector according to claim 1,wherein: at least a portion of the connector comprises a polymermaterial; and the polymer material comprises polyethylene (“PE”),polypropylene (“PP”), polyvinyl chloride (“PVC”), or thermoplasticelastomer (“TPE”).
 10. The irrigation pipe connector according to claim1, wherein: at least a portion of the connector comprises a polymermaterial; and the polymer material comprises an elastomer.
 11. Anirrigation pipe connector comprising: a core having an axis (C) andbeing adapted to connect to an irrigation element; and a wing connectedto the core and extending radially outwardly therefrom relative to theaxis (C), the wing comprising a flange having a radially inward segmentand a peripheral segment that extends radially outwardly from theradially inward segment; wherein: a thickness of the peripheral segmentis smaller than a thickness of the radially inward segment, thethicknesses of the segments being taken in a direction along the axis(C); and at least a portion of the connector is adapted to resilientlybend to thereby allow displacement of the flange relative to the core.12. The irrigation pipe connector according to claim 11, wherein thecore and the wing are integrally formed of the same material and haveunitary one-piece construction.
 13. The irrigation pipe connectoraccording to claim 11, wherein: the core has a threaded through goingbore.
 14. A lay-flat irrigation pipe comprising: a lumen including apipe wall, wherein the lay-flat irrigation pipe when rolled onto a reelhas a shape of a generally flat strip; and at least one irrigation pipeconnector, said irrigation pipe connector comprising: a core adapted toconnect to an irrigation element; and a wing extending about the coreand comprising a segment connected to the pipe wall; wherein: at least aportion of the wing is adapted to resiliently bend to thereby allowdisplacement of the segment connected to the pipe wall, relative to thecore.
 15. The irrigation pipe according to claim 14, wherein: the coreand the wing are integrally formed of the same material and have unitaryone-piece construction.
 16. The irrigation pipe according to claim 14,wherein: a groove is formed in the connector between the segmentconnected to the pipe wall and the core to thereby facilitate thedisplacement of the segment relative to the core.
 17. An irrigation pipeconnector comprising: a core having an upper portion, a lower portion,and a threaded bore extending through the upper and lower portions, thethreaded bore being devoid of threads at the upper portion, the corebeing adapted to removably connect to an irrigation element via thethreaded bore upon insertion via the core's upper portion; a wingconnected to the core and extending radially outwardly therefrom, thewing comprising a leg and a flange, the flange being adapted to attachto a wall of an irrigation pipe, the leg being attached at a first endthereof to the flange and at a second end thereof to the core; and agroove, open toward the upper portion, formed in the connector betweenthe core and the leg; wherein: the irrigation pipe connector is adaptedto resiliently bend via at least the groove to thereby allowdisplacement of the flange relative to the core.
 18. The irrigation pipeconnector according to claim 17, wherein the core and the wing areintegrally formed of the same material and have unitary one-piececonstruction.
 19. The irrigation pipe connector according to claim 17,wherein a depth of the groove is at least as great as a thickness of theleg.
 20. The irrigation pipe connector according to claim 17, whereinthe leg extends upwardly and radially outwardly, from the core's lowerportion towards the flange.
 21. The irrigation pipe connector accordingto claim 17, wherein: the leg connects to the core at a first resilientregion; and the leg connects to the flange at a second resilient region.